Record controlled tabulator type



Aug. 9, 1938. H. wl-:lNLllcH ET AL RECORD CONTROLLED TABULATOR TYPE Filed April 19, 1932- F IE5.

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INVENTORS 1 ATroRNl-:Y

Aug- 9, 1938. H. wElNLlcH E1' A1. 2,126,595

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Aug 9, i938, H, wExNmce-l ET AL RECORD CONTROLLED TABULATOR TYPE l5 Sheets-Sheet 6 Filed April 19, 1932 Aug. 9, E938, H. WExNLicH Er AL RECORD CONTROLLED TABULATOR TYPE Filed April 19, 1932' l5 Sheets-Sheet T INVENTORS BY V7] m r' ATTORNEY Q, @38 H. wElNLlcl-l ET AL 2,26,595

RECORD CONTROLLED TABULATOR TYPE Filed April 19, 1932 15 Sheets-Shee 8 ATTORN EY Aug., 9, 1938. H. wx-:mLxcl-l ET AL RECORD CONTROLLED TABULATOR TYPE Filed April 19, 1952 l5 Sheets-Sheet 9 ATTORNEY Auga 9 1938. H. wElNLxcH r-:T AL

RECORD CONTROLLED TABULATOR TYPE Filed April 19', 1932 l5 Sheets-Sheet 10 n@ ma m@ Sm 'rurali 1 v 1 u r r 1 f MSN ATTORNEY Aug. 9, 1938. H. Wr-:NLlcH ET AL RECORD CONTROLLED TABULATOR TYPE Filed April 19, 1932 l5 Sheets-Sheet ll BY M,

ATTORNEY H. VXEUiLiC- ET AL RECORD GONTROLLED TABULATOR TYPE 15 sheets-sheet 12 Filed April 19, 1932 ufff mash

ENTORS INV ATTO@ N EY O O G O O O N O O O O 0 O O O O www Aug. 9, W38. H. WElNLlcx-z ET AL RECORD CONTROLLED TABULATOR TYPE Filed April 19, 1932 l5 Sheets-Sham". 13

ug- 9, 1938 H. WEINLICH ET AL 2,126,595

RECORD CONTROLLED TABULATOR TYPE Filed April 19, 1932v l5 SheebS-Sheeb 14 FIG23.

INVENTORS BY 'ji/w Maw/;

ATTORNEY Aug 1938. H. wElNLlcH ET A1.

RECORD CONTROLLED TABULATOR TYPE Filed April 19, 1932 l5 Sheets-Sheet l5 OOOOOOO INVENT ORS ATTORNEY Patented Aug. 9, 1.938

PATENT OFFICE RECORD CONTROLLED TABULATOR TYPE Hermann Weinlich and Ulrich Klm, Berlin, Germany, assignors, by mesne assignments, to In-` ternational Business Machines Corporation,

New York, N. Y., a corporation of New York Application April 19,

10 Claims.

This invention relates to accounting machines and more particularly accounting machines of the record controlled tabulator type. l

The principal object is to provide an improved accounting system -in which a controlling accounting machine may be associated with a punching machine for punching' data in record cards under control of the tabulating machine.

Another object resides in .the provision of a punching machine which may be remotely controlled by an accounting machineA of the tabulator type and in which, through improved mechanism, the machines need not be synchronous in their operation.

The tabulating machine is adapted to analyze groups of record cards and accumulate and vprint totals in accordance with the analysis of the record cards. The record cards are usually arranged in groups and after the complete analysis of each group a total printing cycle of operations is initiated during which the total for the vgroup is printed and the accumulators reset. In the present invention provision is made for delaying the usual total printing and resetting operations to permit the automatic controlling of a punching machine in accordance with the total in the accumulator to prepare a so-called summary or total card. Following this punching operation the suspended total printing and rev setting operations are permitted to automatically resume.

In tabulating machines of the type employed in the present system provision is made for entering designation data into an entry receiving device from the rst card of each group. These data are retained in the device until a total printing cycle of operations takes place during which they will be printed together with the totals from other accumulators.

The present invention contemplates automatic punch controlling mechanism which will permit the operation of the punching machine under control of the indicating device without interrupting the operation of the tabulating machine or in other words, while entries are being made into other accumulators of the machine.

A further object of the invention is to provide improved selecting mechanism for determining which of a plurality of accumulators in the tabulator shall control the operation of the punching machine.

Various other objects and advantages of the invention will be obvious from the following particular description of one form of mechanism 1932, Serial No. 606,092

embodying the invention or from an inspection of the accompanying drawings; and the inven- Y tion also constitutes certain new and novel teatures of construction and combination of parts hereinafter setorth and claimed.

In the drawings:

Fig. 1 is a general view of the arrangement of the two units of the apparatus, the tabulating machine being shown in the upper part of the drawings and the punching machine in the lower part, the two being connected with suitable connecting wires.

Fig. 2 is a diagram including a detail card and a summary card and serves to diagrammatically illustrate the distribution of data between the cards and the counters..

Fig. 3 is a diagrammatic representation of a controlling bar in the punch. Fig. 4 is a fragment of a printed record sheet.

Fig. 5 is a section taken on lines 5-5 of Fig. 1, showing the general arrangement of the printing mechanism.

Fig. 6 is a section taken on the line 6-6 of Fig. l`, showing the arrangement of certain machine 'controlled cam contact devices.

Fig. 6a is a detail of a double-step relay.

Fig. '7 is a section taken on the lines 1-1 of Fig. l, showing the accumulating mechanism.

Fig. 8 is a section taken on lines 8--8 of Fig. 7.

Fig.` 9 is a detail of parts associated with the highest order indicating wheel of one of the accumulators.

Fig. 10 is a plan view of the punch.

Fig. 11 is a detail of a special relay.

Fig. 12 is a further detail of the relay, showing the contacts controlled thereby.

Fig. 13 is a central section through the punch, the section being taken substantially along lines 13-13 of Fig. 10.

Fig. 14 is an elevational view of the central portion of the punch with certain parts broken away to show the interior mechanism.

Fig. l5 is an elevational view of the left end of the punch, showing the card ejecting mechamsm. v

Fig. 16 is a detail view looking at the rear of the punch, showing the escapement mechanism and the column selecting device.

Fig. 17 is a detail of parts shown in Fig. 16.

Fig. 18 is a detail section taken on lines lil-I8 of Fig. 16.

Figs. 19 and 20, taken together, show in perspective the card feeding devices of the punch.

Fig. 21 is a view of devices shown in the wir- Cil ing diagram of the machine, showing the plugging connections between the punch and the tabulator.

Figs. 22, 23. and 24, placed side by side with Pig. 22 on the left, Fig. 23 in the center, and Fig. 24 on the right, constitute a wiring diagram 0i' the electric circuits of the entire accounting system.

The two units of the apparatus are shown in Fig. 1 as comprising a tabulating machine T, which is of the general type shown in Patent No. 1,762,145, issued June 10, 1930, to Daly and Page. The punching machine, generally designated P, includes punching mechanism of the type shown and described in Patent No. 1,772,186, issued August 5, 1930, to Lee and Phillips.

The tabulating machine is adapted to feed record cards, such as the detail card of Fig. 2, past sets of upper and lower analyzing brushes which sense the data on the record cards and control the operation of counters accordingly. The tabulating machine includes a plurality of accumulators indicated on the drawings as CTR #L CTR #2, CTR #2, CTR #4, and CTR #5. Accumulator CTR. #I may be arranged to function as a so-called indicating counter; that is, it may receive a single entry from the first card of a group being fed through the machine, while the remaining accumulators may receive entries from each of the cards of the group. The specific manner in which such entries are made is fully set forth in the patent to Daly and Page, referred to, and only so much of the explanation as is necessary for an understanding of the present invention will be given herein.

Two of the accumulators, namely CTR #4 and CTR #5, may be arranged to accumulate balances of credit and debit data punched on the detail cards. In order to simplify the explanation and clarify the understanding of the problem. the separate detail cards have been represented as being perforated with the amount of a transaction and also with the complement thereof; for instance, in Fig. 2, the detail card is perforated in columns 1 to I3 with an amount 324 and columns 20 to 26 are perforated in accordance with tile complementary value of this amount. Where the amount is a debit quantity, it is entered in the field comprising columns 7 to I3 and its complement in the other field. Where a credit quantity is involved in a transaction, the true value of the credit amount is perforated in the field including columns 20 to 26 and the complement thereof in the other field. A special perforation, designated II), is made in the eleven" index point position of a predetermined column of the detail card whenever the card contains a debit quantity.

As indicated diagrammatically in Fig. 2, all entries from columns l to Il are made in accumulator #4 and all entries from columns 20 to 25 are made in accumulator #5 so that accumulator #4 will contain all debit amounts and the complements of all credit amounts and accumulator #5 will contain all credit amounts and complements of debit amounts. Consequently, one of these two accumulators will always show a true number and the other the complement thereof` 'I'he summary card of Fig. 2 is adapted to be prepared under control ci' the various accumulators of the tabulatlng machine'l,y The fleld designated"Total" is adapted to receive perforations under control of either accumulator CTR #4 or at :umulator C'I'R #5, depending upon which of the two contains the true or positive balance. The field headed Total quantity" will receive an entry directly from accumulator CTR. #3 as indicated. The field headed Code No." will receive its entry under control of accumulator C'I'R #L The various mechanisms of the system will now be separately explained in detail, after which the circuit dia;l ram will be explained and the manner of coordination of the various units l pointed out.

Tabulator card feed mechanism Accumulating units As the perforated cards pass the lower brushes, their index points instantaneously close circuits through the proper lower analyzing brushes LB to energize accumulator magnets I4 (Fig. 7). As usual, the timed energizations of these magnets control mechanism for entering the data corresponding to the card reading on the wheels I5. 'I'he wheels I5 are driven from a clutch shaft I6 to which a gear Il is coupled upon energization of magnet I4. Gear I1 has driving connection with wheel I5 through a gear I8 fast upon the wheel. Gear also drives a gear I9 upon which is mounted a yoke 20 (see also Fig. 8). Slidably mounted on tact plungers 2i urged outwardly by a looped leaf spring 22. One of the plungers 2I cooperates with an arcuate conductor 23 while the other plunger cooperates with a plurality of segments 24 which correspond in number and position to the several digit indicating positions of the Wheel I 5. The relationship between the several parts is such that the contact plungers 2| are angularly displaced according to the reading on the wheel. Thus, when the wheel is set to represent 5, one of the plungers 2i will be in contact with the 5 segment 24 and the other plunger will be in contact with the conductor 23. Each group oi' segments 24 corresponding to the same digit constitutes a common bar of conducting material mounted at its ends upon an insulating block 25.

In Fig. 9 is shown the wheel I5 of the highest order of accumulator CTR #4. This wheel is provided with the usual tens carry mechanism and is so arranged that when the wheel passes through the zero position, the lever 26 is rocked in a clockwise direction to cause closure of contacts 27. The function of these contacts is to assist in selecting the proper accumulator for balance printing in a manner to be more fully set forth in connection with the explanation oi the wiring diagram.

Printing mechanism 'I'he printing mechanism is shown in Fig. 5 and is identical with that shown in the Daly and Page patent mentioned above. The type bar 28 is positioned relatively to the platen 29 to bring the proper type 30 into printing position opposite the platen 29. The total shaft 3|, driven by the yoke is a pair of coni lTI) the reset motor RM, is provided i 'ith a cam 32 cooperating with a roller 33 carried on arm 34 which is freely rotatable on shaft 35. As the cam rotates, arm. 34 rocks clockwise and a lug 36 onarm 34 cooperating with a double-armed member 31 fixed to shaft 35 also rocks the member clockwise. An arm 38 fixed to shaft 35 is linkedto printing crosshead 39 which serves to raise the type bar 28 in synchronism with the total taking operation so that the type 30 successively pass printing position opposite platen 29. Owing to spring operated scissors connections 40, however, the type bars 28 may be arrested in any printing position without interfering with the upward movement of the crosshead 39. The type bars are arrested under control of the printing magnet 4|. When this magnet is energized, it attracts its armature 42 and pulls a call wire 43 to the right, thereby releasing ay latch member 44 normally holding stop pawl 45. When the pawl 45 is so released, it is spring operated to engage ratchet teeth 46 formed on the type bar 28 to prevent further upward movement of the type, thus holding a particular type 30 in printing position.

During listing operations, shaft 35 is rocked to reciprocate printing crosshead 39 under control of listing cam 41 carried by list shaft 48, which is operated from the motor TM inthe usual manner during listing and card feeding operations. Cam 41 is provided with a cam slot 49 which cooperates with follower roller 50 carried by an arm loosely mounted on shaft 35. A lug 52 on arm 5| cooperateswith double-armed member 31 to rock shaft 35. The configuration of groove 49 is such that the type bars are elevated and the type 30 moved past printing position in synchronism with the passage of the corresponding index point positions of the record cards past the analyzing brushes.

During total printing operations timed irnpulses are transmitted through the commutator segments 24 of Fig. '7 in a manner to be explained to energize magnets 4| at the proper time to select a type for printing. The device for emitting the timed impulses synchronized with the movement of the type bars 28 is shown in Fig. 6 and comprises a plurality of cams 53 mounted upon a shaft 54 which is driven through gears 55 bytotal shaft 3|.

Cams 53 control contacts 56 and are timed so that one contact will close as each type 30 on type bar 28 is passing printing position.4 There are nine cams 53 and nine related contacts 56, there being one contact for each of the sets of commutator segments 24 relating to a particular digit. The manner in which these cams and contacts transmit timed impulses to the segments 24 will be more fully set forth in connection with the explanation of the wiring diagram.

The adding and printing mechanism just described are well known in the'art and only sufficient thereof has been explained to point out the relationship therewith of the total printing controlling commutator devices which have been incorporated therein for the purposes of the invention.

Double-step relay A double-step relay is illustrated in Figs. 6a, 11 and 12 whose function is to select the proper accumulator for balance printing when subtracting operations are being performed. The relay comprises a magnet 51 which, upon energization, will rock its armature 58 which is secured to a pivoted rod 59. Rod 59 also carries an arm 68' at the free end of which is pivoted a pawl 6| pressed by spring 62 into engagement with a ratchet 63 having ten teeth. A spring pressed member 64 pivoted at 65 serves as a detent to hold ratchet 63 in position. Rocking of rod 59 will elevate pawl 6| to advance ratchet 63 one tooth. Ratchet 63 is mounted upon a rod 66 which also carries a pair of cams l61 of pentagonal outline.

Cooperating with each cam 61 are contacts 68 and 69 which are adapted toopen andclose respectively when the high points of their cams 61 lie directly above rod 66. Since ratchet 63 has ten teeth and cams 61 have ve low points and five high points, it is obvious that a single operation of magnet 51 will open contacts 68 and close contacts 69 and a second energizationv will permit them to resume the position they occupy in Fig. 12. The function of contacts 68 and '69 will be fully explained in connection with the circuit diagram.

Punching Ymachine card feed mechanism Such leftward actuation of the rack also serves to move a card carriage 14 (Figs. 19 and 20) to the right to a position to receive the card when the picker 12 reaches the end of its leftward movement. The card is then punched coly umn by column, as required, and the card carriageA 14 moved step by step to the left. When the punching of the card is completed and the carriage has reached the end of its movement the punched card according to the present invention is automatically removed and the operation repeated.

The punches l13 may be operated normally by means of numeral keys 15 (Fig. 13) or may be controlled in accordance with the data contained in the accumulators of the tabulating machine.

The rack 10 is also used to actuate the card carriage 14. To this end the teeth along the upper edge of rack 18 mesh with the teeth of a pinion 16 and a gear 11 (Figs. 14 and 20). The pinion 16 is secured to a shaft 18 on which is mounted the usual coil spring barrel 19 for returning the rack 10, when released, to its normal position as more fully shown and described in the patent to Lee and Phillips No. 1,712,186, dated August 5, 1930. The gear 11 is suitably supported for rotation and is fixed to a member 80 having a single tooth in the plane of a pawl 8| pivoted to a disk 82 attached to shaft-83. At its other end shaft 83 is'provided with a gear 84 fixed there- Y on and meshing with teeth in the lower edge of a rack which may be considered as forming part of the card carriage 14.

To control the clutch device 80, 6| provision is secured to cam element 85 whereby the coaction of the end of block 89 with pin 96 at the extreme rightward position of rack 1|) will cause cam edge 81 to rock pawl 8| out of engagement with the 75 shoulder of disk 80. In this position of the parts, the carriage 14 Ais freely movable.

When, however, the rack 10 is shifted to the left, it will, through block 89, release cam element 05, permitting a spring 9| to rock pawl 9| sufficiently to pass in front of the shoulder of member l0 which in the meantime has been brought to the necessary position by initial clockwise rotation of gear 11 by the upper teeth of rack 10. It should thus-be observed that a leftward movement of rack 10 will transmit through clutch device 80, 8| power to move carriage 14 to the right to receive a card positioned by the picker 12 in the punching mechanism.

The top of carriage rack 14l observing Figs. 16 and i9, is also provided with rack teeth 92 inclining towards the left end of the machine as viewed in Fig. 19 which are provided for the purpose of controlling the stepping of the carriage by increments to provide for successively punching the card in the multiple columns. The description of the escapement mechanism referred to will be given in sufficient detail hereinafter to understand its cooperation with certain improvements incorporated therewith. The escapement mechanism Just referred to is of the same general nature as that disclosed in the Schaaff Patent No. 1,426,223, granted August 15, 1922 and reference may be had to this patent for further details of construction and operation.

The escapement mechanism referred to is adapted to hold the carriage 14 when it has reached its extreme limit of its return movement and at this time the first column of the card to be punched will lie beneath the row of the punches 13 (Fig. 13) which have enlarged upper ends guided in a member 93 and lower ends extending through openings in a guide or stripper member 94 and immediately above openings in a die plate 95.

The punches 13 are of the general form disclosed in the patent to Lee and Phillips, No. 1,772,186, and are normally held in raised position by spring 96 interposed between the enlarged heads thereof and the stripper member which is provided with openings to receive the lower ends cf said springs. Resting on the upper ends of said punches are interposers 91 supported at their rear ends on a cross member 98 and resting against the lower face of an overlying plate 99 so that they prevent further upward movement of said punches. The interposers 91 are so notched at their forward ends that when they are in normal position depression of an actuating plate |00 against a spring |0| will move a portion |02 of the depressor plate |00 into such notches.

However, when any numeral key 15 is depressed it will actuate a bell crank |02 against the action of suitably connected springs. The forward arm of each bell crank has a rounded head fitting into a notch in the shank of the key, the upright end having a pin |03 in a slot in the lower edge of the corresponding interposer 91. Such interposer will then be advanced to such a position that depression of the plate |00 will effect depression of the interposer and consequently of the corresponding punch.

Upon movement of any of the interposers 91 a pair of contacts |04 is adapted to be closed, thereby closing the circuit to a punch magnet |05 which through intermediate mechanism is adapted to rock the depressor plate |00 to actuate the selected punch 13. Subsequently the circuit of the magnet will be broken allowing the return of the depressed interposer to normal position.

Upon energization of the punch magnet |05 in this manner, the armature |05 will be swung about its'pivot |01 away from the abutment or stop |09 and through the link |09 (Fig. 14) will rock a bell crank ||0 about the pivot to draw the link I|2 downward and rock the plate or depressor |00.

Subsequently the circuit of the magnet |05 will be broken allowing the return of the depressed interposer to normal position. At this time the escapement mechanism will be effective and the card carriage 14 will advance one tooth to permit punching in the next column of the card.

Across the lower edge of all of the interposers 91 is a bail or universal member ||3 pivoted at ||4 and reaching into notches |5 in the interposers. Attached to the bail member ||3 is a depending arm i I6 held against a bracket on link |09 by a spring I1. This spring also tends to pull the arm ||6 downwardly rocking the bail H3 clockwise into engagement with the right hand shoulder of the slots |I5 in the interposers 91.

The arm I|6 has a shoulder 8 normally hooked under the lower contact leaf of the pair of contacts |04. When a key 15 is depressed to move one of the interposers 91 to operative position this interposer rocks the bail |I3 counterclockwise raising the arm ||6 and causing contacts |04 to be closed. This causes energization of magnet |05 as will be pointed out in the wiring diagram to operate the perforating device. As the punch 13 passes through the card and the link |09 'moves to the right, the member on the link will push the arm I6 to the right so that the lower contact leaf will be released and contacts |04 will then open, deenergizing the magnet |05 and permitting the punch and its actuating mechanism to return to normal positions.

The interposer 91 returns when the key 15 is released and permits bail |3 to turn clockwise to normal position and arm I6 to be lowered so that its shoulder 8 will again snap under the contact leaf and be ready to close the contacts when the next key is depressed. It will be recognized that when the contact leaf is released contacts |04 cannot be closed again until the key 15 which effected their closing has been released and the next key depression effected.

The operation of the punches may also be controlled by means of circuits from the accumulators of the tabulator which cause the selector magnets |20 (Fig. 13) to be actuated in accordance with the amount contained in the accumulators. The selector magnets are twelve in number and operate the ten numeral keys and two auxiliary keys, one being marked X and the other i2 (see Fig. 10), and the latter are arranged to operate the two punches at the end of the row farthest from the operator.

Such operation of the keys controlled by the selector magnets may be effected by means of levers |2| (Fig.'13) having at their ends in one direction rounded heads extending into slots in the shanks of the keys 15 to be controlled thereby and extending in the other direction substantially horizontally into a casing for the selector magnets above the cores of the magnets |20, The levers |2| are pivoted to brackets |22 spaced apart and attached to the main frame. Adjustably attached to each of the levers 2| is an armature |23 for cooperation with the corresponding magnet.

'I'he escapement mechanism just referred to is of the same general nature as that disclosed in the patent to Schaan No. 1,426,223, granted August 15, 1922 but in order to give a better understanding of the operation of the machine a brief description of the mechanism will now be given.

A shaft |32 (Fig. 13) is rocked as an incident to each punching or spacing operation due to the rocking of a member |33 carried thereby, by depression of interposers 91 and has secured at one end oppositely extending arms |24 and |25 (Figs. 16 and 19) of which |24 is provided with a laterally projecting pin |26 for engagement with an enlarged opening in a stepping dog |21 which is loosely pivoted on shaft |32. The opposite arm |25 is provided with a laterally extending pin |28 extending in a slot formed in the locking dog |29 between its pivot |30 `and its engaging end.

When the shaft |32 is rocked the arm |24 will, through the pin |26, lift the stepping dog |21 out of one of the notches 92 in the rack 14 and at the same time the arm |25 will depress the locking dog |29 into another notch.

At this time a spring |3| advances the loosely pivoted stepping dog |21 a short distance, suiil- A cient to permit this dog to rest upon the top oi the next tooth. When the locking dog |29 is again raised out of engagement with the teeth 92 at the upper edge of the rack bar 14 as an incident to the return movement of shaft |32, the stepping dog |21, due to the movement of the rack 14 will ride down along the tooth on which it rests until the next tooth 92 strikes the end thereof and the said carriage 14 is thereby arrested.

As the shaft ||4 upon which universal bail ||3 is fixed is rocked from the position shown in Fig. l6 to the position shown in Fig. 17 by a shifting of an interposer 91, a T-shaped element |34 secured to shaft I4 is rocked slightly clockwise.

A spring |35 is coiled about shaft ||4 and has its ends abutting a projection of element |34 and a projection |31 of an element |36 loose on shaft ||4. The projection |31 (Fig. 16) normally abuts a lug |38 of a contact operating member |39 loose on shaft |32, the result being that spring |35 is coiled about shaft ||4 as the element is rocked. When the stepping dog |21 is elevated. the upper edge contacting with an arcuate lug |40 of arm |39 will elevate the latter, permitting the projection |31 to be urged by the spring |35 to ride under the lng |38. An insulating block on the upper blade of contacts |4| contacting with a pin |42 on arm |39 will result in opening contacts |4I. The function of these contacts will be pointed out in connection with the circuit diagram.

As the unversal bail ||3 is returned to its normal position a projection of T-shaped element |34 will strike a projection of element |36 to rock the latter counterclockwise during a return movement of the bail.

It will be recalled that when the armature |06 (Fig. 14) was shifted the extension on link |09 disengaged the notch ||8 of arm ||6 from lower blade of contact |04 so that when bail ||3 is in the rocked position (Fig. 17) notch ||8 will be positioned above the lower contact blade. The arcuate edge of the projection |31 (Fig. 1'1) is of sufiicient length to retain contacts |4| opened until the notch ||8 re-engages the lower blade of contact |04. This insures that the arm ||6 will be in position to close contacts |04 by the aubsequent shifting of a selected interposer prior to the closing of the succeeding circuit, to magnct |05.

Provision is also made of means for automatically returning the carriage 14 and rack 10 to their normal starting positions.

Secured to the underside of the base of the machine is a motor |50 (Fig. 13) coupled to a stub shaft |5| to which is secured a worm |52 in mesh with a worm gear |53 secured to a shaft |54 (see also Fig. 20) one end of which has secured thereto a ratchet shaped clutch element |55 (see Fig. 14). Loosely mounted on shaft |54 is a gear |56 meshing with teeth on the underside of rack 'I0 and to which gear is secured a disk |51.

Pivoted at |58 to disk |51 is an arm |59 having a clutch tooth |60. The free end of arm |58 is connected to a toggle plate |6| by a link |62, the end of toggle plate |6| distant from its pivot |63 being articulated at |64 to one end of a spring |65. The other end of spring |65 is secured to a pin |66 free to rotate on disk |51. By virtue of this construction spring |65 and plate |6| act as a toggle, spring |65 acting to impositively hold tooth |60 in or out of engagement with the clutch teeth of ratchet wheel |55. It will be noted that point |64 lies above a line drawn between centers |63 and |66 when the parts are in the position of Fig. 14. When tooth |60 is engaged in ratchet |55 point |64 will lie below the line of centers |63, |66.

For the purpose of effecting the clutching action a magnet |61 is provided and when energized attracts an armature |68 so that an arm |69 engaging a pin of arm |59 will rock the tooth |60 into engagement with ratchet wheel |55. Through link |62 the toggle connection will be moved outwardly, spring |65 acting to hold clutch tooth |60 in engagement with the ratchet teeth. Gear |56 will thereupon be driven in a counterclockwise direction substantially a single revolution shifting rack 10 to the left. 'I'his will result in moving carriage 14 oppositely to its initial punch controlling position.

At the termination of the counterclockwise movement of gear |56 a tail |1I of arm |59 will strike a projection of a fixed plate |12 to effect the disengagement of the tooth |60 and ratchet wheel |55 by a reverse action. The reverse action of the toggle will cause the tooth |60 to be retained out of engagement with the teeth of the ratchet wheel whereupon the coil spring employed to return the rack 10, fully shown and described in Patent #1,772,186, will act to return the parts to normal position as shown in Fig. 14. As shown and described in the patent just mentioned, a supplemental coll spring is also provided to shift the carriage 14 intermittently under control of the escapement mechanism as an incident to each card punching operation.

Also secured to the pivot of armature |68 is an arm |13 (Fig. 135 the free end of which is adapted to bear upon an insulating block to open contacts |14 when magnet |61 is energized. Contacts |14 are retained opened by a latching bell crank a lug |16 of which is adapted to be struck by a bent up plate |11 (Fig. 20) secured to gear |56 at the termination of the driving movement of the latter. Below contacts |14 are motor control contacts |18 which are latched closed upon an energization of magnet |61 to complete the motor circuit and are unlatched to stop the motor at the termination of the driving operation in the manner just described.

Punched card ejecting mechanism Means are provided for automatically removing a completely punched card and depositing the same in a receptacle provided for the purpose. 'I'his invention is described in detail in the application of J. M. Cunningham, Serial No. 390,755, led September 6, 1929, now Patent No. 1,916,965, 

